<template>
    <div class="container">
        <!-- ai助手 -->
        <div class="chat-container">
            <!-- 聊天框 -->
            <div class="chat-history" ref="historyContainer">
                <!-- 消息循环 -->
                <div v-for="(msg, index) in messages.filter(m => m.role !== 'system')" :key="index"
                    :class="['message', msg.role]">
                    <div class="message-content">
                        <div class="role-tag">{{ msg.role === 'user' ? '我' : 'AI' }}</div>
                        <!-- 添加Markdown渲染 -->
                        <div class="content markdown-body" v-html="renderMarkdown(msg.content)"
                            v-if="msg.role === 'assistant'"></div>
                        <div class="content" v-else>{{ msg.content }}</div>
                    </div>
                </div>
                <!-- 加载指示器 -->
                <div v-if="isLoading" class="loading-indicator">
                    <div class="dot-bounce">
                        <div class="dot"></div>
                        <div class="dot"></div>
                        <div class="dot"></div>
                    </div>
                </div>
            </div>
            <!-- 输入框 -->
            <div class="input-area">
                <textarea v-model="userInput" placeholder="输入你的问题..." @keydown.enter.exact.prevent="handleSend"
                    :disabled="isLoading"></textarea>
                <button @click="handleSend" :disabled="!userInput.trim() || isLoading">
                    {{ isLoading ? '发送中...' : '发送' }}
                </button>
            </div>
        </div>

        <!-- 背景栏 -->
        <div class="bg-bar"></div>
    </div>
</template>

<script setup>
import { ref, watch, nextTick } from 'vue'
import { marked } from 'marked'; // 引入markdown解析库
import hljs from 'highlight.js' // 引入代码高亮库
import axios from 'axios'

// 环境变量
const apiKey = import.meta.env.VITE_DEEPSEEK_API_KEY
const baseURL = import.meta.env.VITE_DEEPSEEK_BASE_URL

const messages = ref([{ role: 'system', content: '你是一个专业的助手' }])
const userInput = ref('')
const isLoading = ref(false)
const historyContainer = ref(null)

// 配置marked
marked.setOptions({
    highlight: function (code, language) {
        const validLanguage = hljs.getLanguage(language) ? language : 'plaintext'
        return hljs.highlight(validLanguage, code).value
    },
    breaks: true
})

// Markdown渲染方法
const renderMarkdown = (content) => {
    return marked(content)
}

// 自动滚动到底部
const scrollToBottom = () => {
    nextTick(() => {
        if (historyContainer.value) {
            historyContainer.value.scrollTop = historyContainer.value.scrollHeight
        }
    })
}

// 消息发送处理
const handleSend = async () => {
    if (!userInput.value.trim() || isLoading.value) return

    // 添加用户消息
    const userMessage = { role: 'user', content: userInput.value.trim() }
    messages.value.push(userMessage)
    userInput.value = ''

    try {
        isLoading.value = true
        // API调用
        const response = await axios.post(
            `${baseURL}/chat/completions`,
            {
                model: 'deepseek-chat',
                messages: messages.value,
                temperature: 0.7,
                stream: false
            },
            {
                headers: {
                    'Authorization': `Bearer ${apiKey}`,
                    'Content-Type': 'application/json'
                }
            }
        )

        // 添加AI响应
        const aiMessage = response.data.choices[0].message
        messages.value.push(aiMessage)
    } catch (error) {
        console.error('API调用失败:', error.response?.data || error.message)
        messages.value.push({
            role: 'assistant',
            content: '抱歉，请求处理过程中出现了问题，请稍后再试。'
        })
    } finally {
        isLoading.value = false
        scrollToBottom()
    }
}

// 监听消息变化触发滚动
watch(messages, scrollToBottom, { deep: true })
</script>

<style scoped>
* {
    font-family: 'Pixel-Font';
}

.container {
    overflow: hidden;
    width: 100%;
    height: 100%;
    background-color: #DCD9D4;
    background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.50) 0%, rgba(0, 0, 0, 0.50) 100%), radial-gradient(at 50% 0%, rgba(255, 255, 255, 0.10) 0%, rgba(0, 0, 0, 0.50) 50%);
    background-blend-mode: soft-light, screen;
    box-sizing: border-box;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.chat-container {
    z-index: 1;
    width: 100%;
    margin: 30px 20% 10px;
    height: 80vh;
    display: flex;
    flex-direction: column;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.chat-history {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background: #fff;
}

.message {
    margin: 12px 0;
    display: flex;
}

.message.user {
    justify-content: flex-end;
}

.message.assistant {
    justify-content: flex-start;
}

.message-content {
    max-width: 70%;
    padding: 12px 16px;
    border-radius: 12px;
    position: relative;
}

.user .message-content {
    background: #666;
    color: white;
    border-bottom-right-radius: 4px;
}

.assistant .message-content {
    background: #f0f0f0;
    color: #333;
    border-bottom-left-radius: 4px;
}

.role-tag {
    font-size: 0.8em;
    color: #666;
    margin-bottom: 4px;
}

.user .role-tag {
    color: rgba(255, 255, 255, 0.8);
}

.input-area {
    padding: 20px;
    background: #eee;
    border-top: 1px solid #eee;
    display: flex;
    gap: 12px;
}

textarea {
    flex: 1;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    resize: none;
    min-height: 48px;
    max-height: 150px;
}

button {
    padding: 12px 24px;
    background: #666;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.loading-indicator {
    padding: 12px;
    text-align: center;
    color: #666;
}

.loading-indicator {
    padding: 12px;
    text-align: center;
    min-height: 40px;
}

.dot-bounce {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    height: 24px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: #666;
    animation: dot-bouncing 1.4s infinite ease-in-out;
}

.dot:nth-child(2) {
    animation-delay: 0.2s;
}

.dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes dot-bouncing {

    0%,
    80%,
    100% {
        transform: translateY(0);
        opacity: 0.5;
    }

    40% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

.bg-bar {
    z-index: 0;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.15) 0%, rgba(0, 0, 0, 0.15) 100%), radial-gradient(at top center, rgba(255, 255, 255, 0.40) 0%, rgba(0, 0, 0, 0.40) 120%) #989898;
    background-blend-mode: multiply, multiply;
    clip-path: polygon(0% 0%, 100% 0%, 90% 20%, 85% 30%, 80% 35%, 60% 50%, 45% 85%, 40% 90%, 20% 80%, 5% 90%, 0% 100%);
    animation: heightAnimation 2s ease-in-out forwards;
}

@keyframes heightAnimation {
    0% {
        height: 0%;
    }

    100% {
        height: 100%;
    }
}

/* 添加Markdown样式 */
.markdown-body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    line-height: 1.6;
}

/* 代码块样式 */
.markdown-body pre {
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: 6px;
    padding: 16px;
    overflow-x: auto;
}

.markdown-body code {
    padding: 0.2em 0.4em;
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: 3px;
}

/* 表格样式 */
.markdown-body table {
    border-collapse: collapse;
    margin: 1em 0;
}

.markdown-body td,
.markdown-body th {
    border: 1px solid #dfe2e5;
    padding: 0.6em 1em;
}

/* 其他元素样式 */
.markdown-body blockquote {
    border-left: 4px solid #dfe2e5;
    margin: 0;
    padding: 0 1em;
    color: #6a737d;
}

.markdown-body ul {
    padding-left: 2em;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3 {
    border-bottom: 1px solid #eaecef;
    padding-bottom: 0.3em;
}
</style>